........ Jack, you're killing me!
Can I be in a band with you guys?
Well,............. we don't ordinarily let strangers up on stage with us. But if you'll tune to A440 and don't screw up the lyrics..... then, maybe.
Ah, but I'm not a stranger, and 440/remembering stuff is still (just) within my grasp.
It won't work without a bass player.